diff options
author | 2019-04-27 20:38:39 +0900 | |
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committer | 2019-04-27 20:40:37 +0900 | |
commit | 4d11ca17d0f73f5bd783f45900118295fdfed46b (patch) | |
tree | cce8575b02ac850d2b30ec12a5c4083c48e85c6c /src/dma/vendor/golang.org/x/text/unicode/norm/readwriter.go | |
parent | 07e4a96e4996f3d39b92dd601b3ed0d23bfbaa0c (diff) |
barometer: update DMA's vendoring packages
Change-Id: I0578b094f1ecdaed20c906be2ba29d51b8089d7c
Signed-off-by: Tomofumi Hayashi <tohayash@redhat.com>
Diffstat (limited to 'src/dma/vendor/golang.org/x/text/unicode/norm/readwriter.go')
-rw-r--r-- | src/dma/vendor/golang.org/x/text/unicode/norm/readwriter.go | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/dma/vendor/golang.org/x/text/unicode/norm/readwriter.go b/src/dma/vendor/golang.org/x/text/unicode/norm/readwriter.go new file mode 100644 index 00000000..b38096f5 --- /dev/null +++ b/src/dma/vendor/golang.org/x/text/unicode/norm/readwriter.go @@ -0,0 +1,125 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package norm + +import "io" + +type normWriter struct { + rb reorderBuffer + w io.Writer + buf []byte +} + +// Write implements the standard write interface. If the last characters are +// not at a normalization boundary, the bytes will be buffered for the next +// write. The remaining bytes will be written on close. +func (w *normWriter) Write(data []byte) (n int, err error) { + // Process data in pieces to keep w.buf size bounded. + const chunk = 4000 + + for len(data) > 0 { + // Normalize into w.buf. + m := len(data) + if m > chunk { + m = chunk + } + w.rb.src = inputBytes(data[:m]) + w.rb.nsrc = m + w.buf = doAppend(&w.rb, w.buf, 0) + data = data[m:] + n += m + + // Write out complete prefix, save remainder. + // Note that lastBoundary looks back at most 31 runes. + i := lastBoundary(&w.rb.f, w.buf) + if i == -1 { + i = 0 + } + if i > 0 { + if _, err = w.w.Write(w.buf[:i]); err != nil { + break + } + bn := copy(w.buf, w.buf[i:]) + w.buf = w.buf[:bn] + } + } + return n, err +} + +// Close forces data that remains in the buffer to be written. +func (w *normWriter) Close() error { + if len(w.buf) > 0 { + _, err := w.w.Write(w.buf) + if err != nil { + return err + } + } + return nil +} + +// Writer returns a new writer that implements Write(b) +// by writing f(b) to w. The returned writer may use an +// internal buffer to maintain state across Write calls. +// Calling its Close method writes any buffered data to w. +func (f Form) Writer(w io.Writer) io.WriteCloser { + wr := &normWriter{rb: reorderBuffer{}, w: w} + wr.rb.init(f, nil) + return wr +} + +type normReader struct { + rb reorderBuffer + r io.Reader + inbuf []byte + outbuf []byte + bufStart int + lastBoundary int + err error +} + +// Read implements the standard read interface. +func (r *normReader) Read(p []byte) (int, error) { + for { + if r.lastBoundary-r.bufStart > 0 { + n := copy(p, r.outbuf[r.bufStart:r.lastBoundary]) + r.bufStart += n + if r.lastBoundary-r.bufStart > 0 { + return n, nil + } + return n, r.err + } + if r.err != nil { + return 0, r.err + } + outn := copy(r.outbuf, r.outbuf[r.lastBoundary:]) + r.outbuf = r.outbuf[0:outn] + r.bufStart = 0 + + n, err := r.r.Read(r.inbuf) + r.rb.src = inputBytes(r.inbuf[0:n]) + r.rb.nsrc, r.err = n, err + if n > 0 { + r.outbuf = doAppend(&r.rb, r.outbuf, 0) + } + if err == io.EOF { + r.lastBoundary = len(r.outbuf) + } else { + r.lastBoundary = lastBoundary(&r.rb.f, r.outbuf) + if r.lastBoundary == -1 { + r.lastBoundary = 0 + } + } + } +} + +// Reader returns a new reader that implements Read +// by reading data from r and returning f(data). +func (f Form) Reader(r io.Reader) io.Reader { + const chunk = 4000 + buf := make([]byte, chunk) + rr := &normReader{rb: reorderBuffer{}, r: r, inbuf: buf} + rr.rb.init(f, buf) + return rr +} |